Lubricating-oil feed for reciprocating engines.



No 849,325. PATENTED APR. 2, 1907.

- F. W. BRADY. A

LUBRIGATING OIL FEED FOR REGIPROCATING ENGINES.

APPLICATION FILED APRJL 1906.

flaw/7%) 146 (7% v M A PATENTED APR. 2, 1907.

F. W. BRADY. LUBRIGATING OIL FEED FOR RBCIPROCATING ENGINES.

APPLICATION FILED APR. 14. 1906.

2 sums-sum 2.

FRANC S W. BRADY, ()F ENGLEWOOD, NEW JERSEY.

LUBPHCATING-OIL FEED FOR RECIPROCATING ENGINES.

Specification of Letters Patent;

Eatenteo April 2, 1907.

Apnligatinn filed April 14. 1906- 'Serial No. 311,767-

To (LZZ whom, it may concern:

' voir m, provided with an inlet-pipe It, sup- Be it known that I, FRANCIs W. BRADY, a l plying oil from a reservoir, (not shown,) and citizen of the United States, residing at Englewood, county of Bergen, State of New Jersey, have invented certain new and useful Improvements in a Lubricating-Oil Feed for Reciprocating Engines; and I do hereby declare the following to be a full, clear, and ex act description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

he object of the invention is to provide efficient mechanism for the positive and regular feed of oil to the bearings of reciprocating engines.

The invention will be understood from a reference to the drawings and a reading of the following description of the form in which I prefer to embody it.

Referring to the drawings, Figure 1 is an elevation, partly in section, of parts of a reciprocating engine provided with lubricating mechanism ,made in accordance with my invention. 2 is a side elevation of the sameparts, also artly in section. Fig. 1 is a view of Fig. 2 rom the left. Fig. 3 is an elevation of the casing of my improved oilump, showin the means for attaching it to lts support. ig. 4 is a side elevation of the pump assembled, and Fig. 5 is a sectional view of the pump. Fig. 6 is an elevation, partly in section, of the oil-cup mounted on the collar surrounding'the wrist-pin of the piston; and Fig. 7 is an elevation of the oilcup looking at the right of Fig. 6 with parts broken away.

Referring to Figs. 1 and 2, a is an outline of the engine-cylinder, b is the piston, and c is the iston-rod or pitman, having a collar (1 at its ower end, which surrounds the crankpin of the engine, (not shown,) and a collar e, which surrounds the wristpin in the pistonhead. The parts above mentioned may be of any ordinary construction and form no part of my invention.

()n the pi tman c is a clampingring f, which carries the oil-pump g. he exit-passage of the oil-pump is connected by a pipe 72 with the lower end of the oil-cup 'i, mounted on the collar 0 and provided at its upper end with an overflow-passagc which is connected with the pipe 7;, by which the overflow from the oil-cup is carried down the length of' the pilman to the crank-pin.

ltigidly secured to the lower end of the cylinder a is a bracket 1, carrying an oil-reseran overflow-pipe 0, whereby the oil in the reservoir m is maintained at a constant level. l The reservoir m is. also provided with dripplates 7) for catching the oil dri ped and splashedby the pump. 7 The brac et 1, carrying the reservoir m, projects inwardly, so that the oil-reservoir is supported directly beneath the pump g. Rigidly secured to the inside of the piston is a pin g, which extends into engagement with a lever-arm on the pump 9 and is held in fixed relation thereto throughout the stroke of the piston.

Referring to Figs. 3, 4, and 5, it will be it a bracket 1", provided with holes for the screws 8, by which it is rigidly secured to the clamping-ring f, and thereby to the pitman 0. At right angles to the bracket r is a tween the arms of which the three-armed lever a is pivoted. One arm of the lever 11. extends into a bearing in the upper end of the pump-plunger v, and the other two arms of the lever are in a position to be engaged by the pin 9 on the engine-piston. (See Figs. 1 and 2.) The pump is provided at its lower end with an inlet-passage in which there is a suction-valve w, cone-shaped at its lower end and provided with appropriate oil-passages. This suction-valve w is pressed into engagement with a beveled seat at the lower end of the inlet-passage by means of a compression-spring as. Immediately above the inlet ssage and at the side of the pistonchamber is an outlet-passage, which is provided with a pressure-valve g, which is pressed into engagement with its seat by compression-spring 2. This exit-passage communicates with the pipe h. A short distance above the outlet-passage and on the opposite side of the piston-chamber is an inlet-port which communicates with the chamber a having a restricted opening I) at its upper end. By this construction when the plunger of the pump is withdrawn the oil is sucked up into the pump-chamber during the first part of the stroke and while the port from the chamber a is covered. As soon as this port is uncovered and during the remainder of the outstroke the contents of the chamher (1 are sucked into the pump, and the suction through the oil-inlet port is relieved. Upon the instroke of the plunger the contents of the pump-chamber are forced back bracket 15, forked at its upper end and beseen that the casing of the pump 9 has cast on terof plunger without increasing the amount wrist-pin.

of oil fed, and thus avoidthe necessity which would otherwise exist of using a pump of an extremely small stroke and diameter of plunger. I prefer so to shape the lever u that the suction-stroke of the pump is completed before the-end of the pump emerges from the reservoir m; but if for any reason it is inadvisable or impracticable to do this my improved construction of pump will have a further peculiar advantage in the relations 111 which I have described it, because the posi tion of the inlet-portfrom the chamber a 'may be made such that the oil is drawn through the oil-inlet port of the pump only during that portion of the stroke in which the tip of the oil-pump is submerged in the reservoir m, and after the tip of the pump has emerged from the reservoir and during the remainder of the stroke the pu-mpsuc'ks in the contents of the chamber a.

In Figs. 6 and 7 I have shown the oil-cup, which is rigidly secured to the collar of the wrist-pin by means of a bolt passing through the lug c on the oil-cup and into a corresponding lug on the collar e. This oil-cup is provided .with a vertical chamber (1, the lower end of which communicates with the oil-supply pipe h and the upper end of which is closed by a screw-cap e. A pcrtf, opening into the side of this chamber, communicates through the oil-duct g (see Figs. 1 and .2) with the wrist-pin. This duct is preferably filled with a wick, by means of which the Oil is evenly fed' from the chamber d to the flow-passage j, into which the-elbow-pipe h is fitted. The pi e h is coupled in any suitable manner wit the overflow-pipe it, by which oil isled down the length of the pitman 0 to the crank-pin of the engine pipes h and k are securely fastened in position on the pitman c by means of suitable collars j.

The operation'of the oil-feed is as follows: When the piston b is at the end of its instrokc, the pump 9 is in the position shown in full lines in Figs. 1 and-2, and the position of the pin p with respect to the arm of the lever u is as s iown in full lines in those figures. Sup posing that the crank of the engine is rotating in acountenclockwise direction, as the pitman- 6 starts its outward movement it is inclined toward the left, carrying with it the pump 9 and the lever u. The pin q,-which is secured tothe interior of the piston-head,

doesnot, however, partake of this sidewise movement,- and the consequent relative Above the port f is the over-' The movement of the pin 9 and the lever a causes the ping to engage with the right-hand arm of said lever and to rotate it on its pivot to press down the plunger of the oil-pump, therebyforcing the oil in the pump upward through the pipe it into the oil-'cup This position of the pump is shown in dotted lines at A in Fig. 1. As the-pitman c continues its outward movement it again approaches the vertical line, causing the'pin Q and the lever u, to assume the relative positions shown in dotted lines at B in Fig. 1. During this time the pin has merely ridden along the surface of the lever u and has not moved the piston of the pump.

The elliptical path of the lower end of the pump is shown in dotted lines in Fi 1, and it will be seen that at position B-t e lower end of the pump is submerged in the oil in the reservoir m.- As the pitman 0 passes be yond the center and becomes inclined toward the right in Fig. 1 the pin q enga eswith the left-hand arm of the lever u and rotates it on its pivot and draws out the plunger, thus drawing. up oil from the reservoir m into the pump. Asthe pitman moves inward. again the pump assumes a position shown in dotted lines at C in Fig. 1, in which position the plunger of the pump is drawn out and the oil is held in the pump. As the pitman reaches the end of its instroke the pump again assumes the position shown in full-linesin Figs. 1 and 2, and on the next outward movement of the pitman the oil is expelled into the pipe h, as alreadydescribed. The oil is thus fed drop by drop up the pipe h and into the oil-cup i, from which it is fed by theduct g" to the wrist-pin and by the overflow-pipe k to the prank-pin. Instead of having the pump mountedv on the pitman and the actuating-ping secured to the pistonhead it would of course be possible to re verse theparts and have the pump mounted on the piston-head and the actuating-pin mounted on the piston. I I

I prefer to fill the chamber a full or partially full of oil, so that when the port beof my improvements will be clearly understood from the above description of-the form in which I prefer to embody them, though it will be understood that my improvements may be embodied in other forms without departing fromthe spirit of my invention.

What I claim is 1. In a lubricating-oil feed for reciprocating engines, an oil-pump secured to the engine-pitman, and partaking of the sidewise movement thereof and a projection in the path of the movement of the pump and engaging therewith to actuate it during its side- Wise movement.

2. In a lubricating-oil feed for reciprocating engines, an oil-pump rigidly secured to the engine-pitman in such manner as to partake of the sidewise movement thereof, and means whereby the pitman in its sidewise movement will operate the pump to feed oil to the engine-bearings.

3. I11 a lubricating-oil feed for reciprocating engines, an oil-pump carried by the engine-pitman, an actuating-lever for said pump, and a projection on the engine-piston engaging said lever, whereby the sidewise movement of the pitman actuatcs the oilpum 4. In a reciprocating engine, a piston having a wrist-pin, a pitman provided with bearings for the said wrist-pin and for a crankpin, an oil-cup communicating with the wrist-pin bearings and provided with an overflow-passage, an oil-pump mounted on the pitman and actuated by the sidcwise movement thereof to feed oil to the cup, and an oil-pipe leading from the overflow-passage in the oil-cup to the bearings for the crankpin, substantially as described.

5. In a reciprocating engine, a iston hav- 7 ing a wrist-pin, a pitman provide with bearings for the said wrist-pin and for a crankpin, an oilcup plunger actuated by the side- -w1se movement of the pitman, a chamber for said plunger having an oil-inlet and a second inlet so constructed and arranged as to be opened after the suction-stroke of the plunger has begun, the said chamber also having a discharge-port, an oil-cup communicating with the wrist-pin bearings and having an overflow-port, a pipe connecting the discharge-port of the pump with the oil-cup, and a second pipe leading from the overflowpassage in said cup to the bearings for the crank-pin, substantially as described.

6. In a lubricating-oil feed for reciprocat ing engines, an oil-pump actuated by the movement of the engine-piston, and having an oil-inlet-to the pump-chamber, and a second inlet to said chamber so constructed and arranged as to be opened after the suction period of the pump has begun.

7. In a lubricating-oil feed for reciprocating engines, an oil-pump plunger actuated by the movement of the engine-piston, a chamber for the plunger having an oil-inlet at its bottom, a second inlet above the oil-inlet, and a discharge-port, and an oil-pipe leading from the discharge-port to bearings on the engine.

8. In a lubricating-oil feed for reciprocating engines, an oil-pump mounted thereon. an oil-reservoir also mounted on said engine, means for causing the pump to dip into the reservoir at intervals and means for creating the suction period of the pump while it is dipping into the reservoir.

9. In a lubricating-oil feed for reci rocating engines, an oil-pump mounted t iereon, an oil-reservoir also mounted on said engine, means for causing the pump to dip into the reservoir at intervals, means for creating the suction period of the pum while it is dipping into the reservoir, an means for maintaining constant the oil-level in the reservoir.

10. In an oil-feed for reciprocating engines, an oil-pump rigidly secured to the en gine-pitman and partaking of the sidewise movement thereof, anpil-reservoir so mounted in the path of the movement of the pump that the pump dips into itat the end of the outward stroke of the itman, and means actuated by the sidewlse movement. of the pump to-create its suction period while it is dipping into the reservoir.

11. In a lubricating-oil feed for reci rocating engines, an oil-pump 'mounted t iereon, an oil-reservoir also mountedpn said engine, means for causing the pump to dip into the reservoir at intervals, an oil-inlet to the pump-chamber, a second inlet to the said chamber, and means fori withdrawing the pump-plunger while the pump is dipping into the reservoir, thel'second mletlbeing so constructed and arranged as to be opened after the pump-plunger is partially withdrawn.

12. In a reciprocating engine, a iston having a wrist-pin a itman provide with bearings for the said wrist-pin and for a crank pin, an oil-pump mounted on the pitman, an actuating-lever for the pump, a projection on the pistonjen agin :Wlth t e lever, an oil-reservoir mounted on t e 'engine in the path of the movement of-the ump, a plunger in the um actuated by t e said lever, a chamber or t e plunger, provided with an oil-inlet at its bottom, a second inlet above the oil-inlet, and a discharge-port, an oil-cup communicating with the wrist-pin bearings and having an overflow-passage, a pipe connecting the dischargeort of the pump with the oil-cup, and a pipe eadin from the overflow-passage in the cup' 'to the bearings for the crank-pin.

13. In a lubricating-oil feed for reciprocating engines a suction-pump provided with an induction-portcommunicating with an oilsupply, and an eduction-port communicate ing with the bearing to be lubricated, and means for relieving the suction through the induction-port during the suction period of the pump.

14' In a lubricating-oil feedlforireciprocat ing engines, a suction-pump provided with an inductiomport communicating with an oil-supply, an eduction-port communicating with the bearings to be lubricated, and a second induction-port, and a chamber condag mining oil con'n'mmicating with the second induction-port the second induction-port being so constructed and arranged to be 0 en during :1 part of the suotien period of 5 t 1e pump and a correspondingpagt of the expulsion period of the pump.

.15. In a l11lar1eating-oil feed for reciprocating engines, an oil-pump rigidly secured to a reciprocating part, in]. oil-reservoir mounted at one extremity of thepath of the movei0 ment of said pump, and dri -aprons for said reservoir, substantially as escribed.

In testimony- Whereof I afiix my'signajture in presence of two Witnesses.

FRANCIS BRADY.

Witnesses: 4

BURGESS A. CURDENL WILLIAM H. DAVIS. 

